Composite sealing ring waste recycling device and recycling method

Abstract

The invention discloses a composite sealing ring waste recovery device and a recycling method, and relates to the field of solid waste harmless treatment.The composite sealing ring waste recovery device comprises a recovery treatment box, a rotating cylinder is rotationally arranged in the recovery treatment box and is obliquely arranged, and a composite sealing ring is thermally decomposed in the rotating cylinder and forms copper sheets, silicon dioxide, carbon dioxide and water; a filter box is arranged below the rotating cylinder, a filter screen is arranged at the upper end of the filter box, a filter layer is installed on the side, away from the transfer chamber, of the filter box, an air pump is arranged outside the recovery treatment box, and an oxygen supply pipe, a discharge pipeline and a recovery pipeline are arranged on the air pump. The composite sealing ring can be decomposed into a copper sheet with copper oxide on the surface, silicon dioxide, carbon dioxide and water at high temperature, the purpose of harmless thermal decomposition treatment is achieved, byproducts such as the decomposed copper sheet, carbon dioxide and silicon dioxide can be put into a second industry for use, and an industrial chain is achieved.

Description

Technical Field

[0001] The invention relates to the field of harmless treatment of solid waste, and in particular to a composite sealing ring waste recovery device and a recovery and reuse method. Background Art

[0002] When recycling composite sealing ring waste, it usually goes through: ‌1) ‌Classification and cleaning‌: Sort the used sealing rings, remove impurities such as metal and plastic, and perform high-temperature or chemical cleaning to remove oil stains‌.

[0003] 2) Initial crushing: Use an eagle claw pre-crusher to cut the sealing ring into pieces with a diameter of about 0.5 cm.

[0004] 3) Fine grinding ‌ Micro-crushing and sorting ‌: It is further ground into 10~40 mesh micro-powder by a vertical shaft reflection type micro-crusher, and the air flow is used to sort the qualified particles (for regeneration) and the unqualified particles (for recycling).‌

[0005] 4) Regeneration Processing Compression molding: The powder is mixed with a binder and then processed under high temperature and high pressure to form new seals or other rubber products.

[0006] However, this method is only suitable for processing sealing rings composed of a single rubber product. Therefore, it is necessary to propose a composite sealing ring waste recovery device and a recycling method to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to provide a composite sealing ring waste recovery device and a recovery and reuse method to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a composite sealing ring waste recycling device, comprising a recycling treatment box, wherein a rotating drum is rotatably arranged in the recycling treatment box, and the rotating drum is arranged obliquely, and the composite sealing ring is thermally decomposed in the rotating drum to form copper sheets, silicon dioxide, carbon dioxide and water; The upper end of the rotating cylinder is provided with a feed pipe connected to the outside of the recycling and processing box, the lower end of the rotating cylinder is provided with a separation port for discharging copper sheets formed after the thermal decomposition of the composite sealing ring, and the lower end of the recycling and processing box is provided with a transfer chamber for the copper sheets to fall, and the lower end of the transfer chamber is connected to the separation and recycling box; A filter box is arranged below the rotating cylinder, a filter screen is arranged at the upper end of the filter box, a filter layer is installed on the side of the filter box away from the transfer chamber, an air pump is arranged outside the recovery and processing box, an oxygen supply pipe, a discharge pipe and a recovery pipe are arranged on the air pump, the end of the recovery pipe faces the separation port, the discharge pipe is connected to the interior of the filter box, an outer composite pipe is arranged outside the discharge pipe, an outer sandwich channel is formed between the outer composite pipe and the discharge pipe, one end of the outer sandwich channel is connected with an oxygen supply pipe, the oxygen supply pipe is connected to an external oxygen tank, and the other end of the outer sandwich channel is connected to the oxygen supply pipe.

[0009] Preferably, a groove is provided on the lower inner wall of the transfer chamber, a rubber pipe mouth is integrally provided at the bottom of the groove, the discharge port above the separation and recovery box is connected to the rubber pipe mouth, a discharge plate is rotatably connected to the groove through a rotating rod, and a torsion spring is provided at the connection between the rotating rod and the discharge plate.

[0010] Preferably, a plurality of sieve holes are provided on the rotating cylinder, and the sieve holes are connected to the inside and outside of the rotating cylinder at the same time.

[0011] Preferably, a motor for driving the rotating drum to rotate is installed at the lower end of the recycling treatment box.

[0012] Preferably, an absorption treatment box is provided at the connection between the discharge pipe and .

[0013] Preferably, a sealing cover is provided at the upper end of the feed pipe in an openable manner.

[0014] Preferably, the bottom of the recycling box is provided with supporting legs.

[0015] Preferably, a pressure relief mechanism is provided above the recycling processing box.

[0016] Preferably, an electric heating plate is installed on the inner wall of the recycling box.

[0017] The present invention provides a method for recycling and reusing waste composite sealing rings, comprising the following steps: S1: thermal decomposition, sending the composite sealing ring into a sealed chamber for thermal decomposition, the thermal decomposition temperature is 400°C to 550°C, the composite sealing ring is mixed in the chamber during the thermal decomposition process, oxygen is provided to the sealed chamber during the thermal decomposition process, and copper sheets, silicon dioxide, carbon dioxide and water are formed after thermal decomposition; S2: separation, separating the copper sheet, silicon dioxide, carbon dioxide and water; Among them, the copper sheet is large in volume and is screened downward by gravity, the silicon dioxide particles are small and are separated by a filter structure arranged in the chamber, the water is evaporated, and the carbon dioxide is extracted by a mechanism that provides oxygen to the chamber; The extracted carbon dioxide contains a small amount of oxygen, which is separated and absorbed by chemical methods to form carbonate byproducts, and the remaining oxygen is circulated and supplied to the sealed chamber for use; S3: The pipeline for supplying oxygen to the sealed chamber is distributed along the pipeline for extracting carbon dioxide from the chamber, and the oxygen is heated by the residual heat in the carbon dioxide and then supplied to the sealed chamber for use; S4: Complete the separation of copper sheets, silicon dioxide, carbon dioxide and water in a sealed chamber to reduce heat and gas loss.

[0018] Technical effects and advantages of the present invention: The present invention can decompose the composite sealing ring into copper sheets with copper oxide on the surface, silicon dioxide, carbon dioxide and water at high temperature, thereby achieving the purpose of harmless thermal decomposition treatment. The decomposed copper sheets, carbon dioxide, silicon dioxide and other byproducts can be put into the secondary industry for use, thus realizing the industrial chain. The method for recycling the composite sealing ring of the present invention realizes the separation of copper sheets, silicon dioxide, carbon dioxide and water, and can fully utilize the residual oxygen and waste heat in the gas to reduce the energy consumption of the overall device, and can form by-products; The entire recovery device is processed in a sealed space to avoid heat and gas leakage, which is energy-saving and environmentally friendly. The circulation of gas supply can further increase the separation effect of copper sheets, silicon dioxide, carbon dioxide and water, and avoid the phenomenon of silicon dioxide impurities mixing with copper sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the composite sealing ring of the present invention.

[0020] Figure 2 This is a structural schematic diagram of a composite sealing ring waste recycling device from one perspective of the present invention.

[0021] Figure 3 This is a schematic structural diagram of the composite sealing ring waste recycling device of the present invention from another perspective.

[0022] Figure 4 It is a sectional view of the three-dimensional structure of the composite sealing ring waste recovery device of the present invention.

[0023] Figure 5 It is a planar structural sectional view of the composite sealing ring waste recovery device of the present invention.

[0024] Figure 6 For the present invention Figure 4 A schematic diagram of the enlarged structure in the middle.

[0025] Figure 7 For the present invention Figure 5 Enlarged schematic diagram of the structure at point B in the middle.

[0026] In the figure: 100, substrate; 200, heat conductive layer; 1, recovery treatment box; 2, feed pipe; 3, sealing cover; 4, pressure relief mechanism; 5, oxygen supply pipe; 6, external composite pipe; 7, oxygen supply pipe; 8, discharge pipe; 9, air pump; 10, absorption treatment box; 11, support leg; 12, recovery pipe; 13, separation recovery box; 14, motor; 15, electric heating plate; 16, rotating cylinder; 17, sieve hole; 18, driving connecting shaft; 19, unloading plate; 20, filter box; 21, filter net; 22, filter layer; 23, feed channel; 24, external interlayer channel; 25, separation port; 26, discharge port; 27, groove; 28, rubber pipe mouth; 29, rotating rod. DETAILED DESCRIPTION

[0027] The present invention provides Figure 1-Figure 7 A composite sealing ring waste recovery device and a recovery and reuse method are shown.

[0028] In the prior art, the heat-conducting composite sealing ring usually consists of four parts: The first part: thermal conductive material, which is the core component of thermal conductive gaskets. Common thermal conductive materials include rubber, silicone rubber, silicone grease, silver paste, etc. These materials can effectively conduct heat and quickly transfer the heat of electronic equipment to the radiator, thereby reducing the temperature of the device.

[0029] Part 2: Substrate: The substrate is usually a flexible material, such as polytetrafluoroethylene, polyimide film, polyamide film, copper sheet, etc. The function of the substrate is to provide support and protection for the thermal conductive material, and at the same time has certain insulation properties.

[0030] Part 3: Adhesive: In order to bond the thermal pad to the electronic device and the heat sink, a certain adhesive needs to be added. The adhesive is usually a high-temperature glue that can maintain stable adhesion at high temperatures.

[0031] Part 4: Other additives: According to the specific requirements of use, the thermal pad can also add some other ingredients, such as fillers, antioxidants, etc., to improve its performance and service life.

[0032] refer to Figure 1 As shown in the figure, the present invention provides a composite sealing ring, which is made of a substrate 100 (copper sheet) and a heat-conducting layer 200 (silicone rubber). The copper sheet can maintain the basic hardness and shape of the composite sealing ring. When the composite sealing ring is used on a sealed object, it can avoid the phenomenon of reduced sealing due to excessive deformation; the silicone rubber is coated on the outer periphery of the copper sheet; the purpose of increasing the flexibility and buffering performance of the composite sealing ring is achieved. Since the silicone rubber can deform to a certain extent to adapt to the shape of the sealing position, the composite sealing ring can ensure good sealing.

[0033] Among them, silicone rubber is an elastic material with excellent properties. When silicone rubber is subjected to high temperature (400°C to 550°C), it will undergo thermal decomposition reaction and form siloxane, silicon dioxide and organic matter; Siloxane is one of the main components of silicone rubber thermal decomposition. It is composed of silicon atoms and oxygen atoms and has high stability and chemical inertness. Siloxane will undergo oxidation reaction at high temperature and further decompose into silicon dioxide and gas.

[0034] Organic matter is mainly decomposed from the organic distribution of silicone rubber and contains elements such as carbon, hydrogen and oxygen. These organic matter have certain volatility and flammability, so they are easy to produce smoke and harmful gases at high temperatures.

[0035] Ultimately, the thermal decomposition products of silicone rubber mainly include silicon dioxide and organic matter, while the elements such as carbon, hydrogen and oxygen in the organic matter eventually form carbon dioxide and water (there may be a small amount of impurities, such as ash produced when the carbon element is impure) through high-temperature combustion; therefore, silicone rubber is eventually thermally decomposed into silicon dioxide, carbon dioxide and water (which may contain a small amount of impurities).

[0036] Among them, when the copper sheet is at a high temperature of 400°C to 550°C, its surface begins to oxidize to form black copper oxide (CuO).

[0037] Therefore, the final products of the composite sealing ring after decomposition at a high temperature of 400°C to 550°C are copper sheets with copper oxide on the surface, silicon dioxide, carbon dioxide and water (which may contain a small amount of impurities).

[0038] refer to Figure 4 As shown in the present invention, a composite sealing ring waste recycling device is provided, which includes a recycling processing box 1, in which a rotating drum 16 is provided. The rotating drum 16 is arranged at an angle, and the composite sealing ring is located inside the rotating drum 16 and is thermally decomposed inside the rotating drum 16.

[0039] Among them, a feed pipe 2 is integrally provided at the upper end of the rotating cylinder 16, and a driving connecting shaft 18 is fixedly connected to the lower end of the rotating cylinder 16. The feed pipe 2 and the driving connecting shaft 18 are both rotatably connected to the recycling processing box 1. One end of the feed pipe 2 that movably extends out of the recycling processing box 1 is provided with a sealing cover 3 in an open and closable manner. A motor 14 is connected to one side of the bottom of the recycling processing box 1 through a bracket, and the rotating shaft of the motor 14 is fixedly connected to the driving connecting shaft 18; when the motor 14 is started, the rotating shaft drives the sieve hole 17, the electric heating plate 15 and the feed pipe 2 to rotate, thereby mixing the composite sealing ring inside the rotating cylinder 16.

[0040] An electric heating plate 15 is fixedly installed on the inner wall of the recycling and processing box 1. The electric heating plate 15 can heat the composite sealing ring inside the rotating cylinder 16. During the heating process, the composite sealing ring performs a mixing movement, so that the composite sealing ring is evenly heated. When the heat of the composite sealing ring reaches 400°C to 550°C, it is decomposed to form copper flakes, silicon dioxide, carbon dioxide and water that form copper oxide.

[0041] Among them, a plurality of sieve holes 17 are evenly arranged on the rotating cylinder 16, and the sieve holes 17 are used to discharge silicon dioxide, carbon dioxide and water. Figure 5 and Figure 7 As shown in FIG, a separation port 25 is provided at the bottom of the rotating cylinder 16 . The diameter of the separation port 25 is smaller than the diameter of the composite sealing ring but larger than the diameter of the copper sheet with copper oxide. Therefore, the copper sheet with copper oxide can eventually fall and be discharged through the separation port 25 .

[0042] A filter box 20 is provided inside the lower end of the recycling and processing box 1, and a filter screen 21 is installed above the filter box 20. The silicon dioxide and water discharged from the sieve hole 17 can fall into the filter box 20 through the filter screen 21 and be collected. A filter layer 22 is installed at the outlet of the filter box 20 to prevent the impurity particles from being further discharged. The water is a small amount of water, which is usually evaporated and discharged inside the recycling and processing box 1. It should be noted that a pressure relief mechanism 4 for controlling the internal pressure of the recycling and processing box 1 is provided on the recycling and processing box 1, such as a pressure relief valve, which will not be described in detail here.

[0043] A transfer chamber is formed between the other side of the filter box 20 and the interior of the recycling and processing box 1, and the transfer chamber corresponds to the bottom of the separation port 25. A groove 27 is provided on the inner wall below the transfer chamber, and a rubber pipe mouth 28 is integrally provided at the bottom of the groove 27. A separation and recovery box 13 is installed at the bottom of the recycling and processing box 1, and the discharge port 26 above the separation and recovery box 13 is connected to the rubber pipe mouth 28. A discharge plate 19 is rotatably connected in the groove 27 through a rotating rod 29, and a torsion spring is provided at the connection between the rotating rod 29 and the discharge plate 19; when the copper sheet falling out of the separation port 25 falls on the surface of the discharge plate 19, the discharge plate 19 opens downward due to the action of gravity compression, and the copper sheet enters the separation and recovery box 13 for collection. When the copper sheet enters the separation and recovery box 13, the discharge plate 19 is reset by the action of the torsion spring.

[0044] The separation and recovery box 13 for collecting copper flakes in the present invention can also form a sealed chamber with the recycling and treatment box 1, ensuring the thermal decomposition efficiency of the composite sealing ring. When the separation and recovery box 13 is full of copper flakes, the empty separation and recovery box 13 can be replaced. The bottom of the recycling and treatment box 1 is provided with a support leg 11 for supporting the recycling and treatment box 1, which is convenient for installing and docking the separation and recovery box 13.

[0045] refer to Figures 2 to 7As shown in the figure, an air pump 9 is installed on the side of the recycling and processing box 1, and an oxygen supply pipe 7, a recovery pipe 12 and a discharge pipe 8 are arranged on the air pump 9, wherein the discharge pipe 8 is connected to the inside of the filter box 20. When the air pump 9 is started, the filter box 20 can generate suction, so that the silicon dioxide, carbon dioxide and water inside the recycling and processing box 1 are collected in the filter box 20, and the recovery pipe 12 is connected to the inside of the recycling and processing box 1, and the connection point faces the separation port 25. The air pump 9 is also connected to an oxygen box, and the air pump 9 extracts oxygen from the oxygen box to supply it to the separation port 25. Near the separation port 25, oxygen can enter the interior of the feed pipe 2 through the separation port 25 to supply oxygen to the silicone rubber inside the feed pipe 2. The sufficient oxygen supply can eventually decompose the silicone rubber into silicon dioxide, carbon dioxide and water. Since oxygen enters from the separation port 25, the phenomenon of silicon dioxide, carbon dioxide and water falling from the separation port 25 to the separation recovery box 13 is avoided. Only heavier copper sheets can enter the separation recovery box 13 through the separation port 25, thereby separating the copper sheets from silicon dioxide, carbon dioxide and water.

[0046] An absorption treatment box 10 is provided at the connection between the exhaust pipe 8 and the air pump 9. Sodium hydroxide or calcium hydroxide is placed in the absorption treatment box 10. During the process of extracting the gas inside the recovery treatment box 1 by the air pump 9, carbon dioxide enters the absorption treatment box 10 and reacts with the alkali to generate carbonate, while oxygen does not react, thereby separating the oxygen; the carbonate can generate by-products through subsequent recovery treatment. Therefore, only oxygen is left in the gas after passing through the absorption treatment box 10, which is combined with the oxygen in the oxygen tank and then supplied to the inside of the recovery treatment box 1.

[0047] In the present invention, the oxygen tank is actually connected to the oxygen supply pipe 5, and an outer composite pipe 6 is sleeved on the outer circle of the discharge pipe 8, and an outer sandwich channel 24 is formed between the outer composite pipe 6 and the discharge pipe 8. The oxygen in the oxygen tank can pass through the outer sandwich channel 24 and is heated by the waste heat of the gas in the discharge pipe 8, so that the oxygen supplied into the recovery and processing box 1 has a certain amount of heat, which has an energy-saving effect. Among them, the oxygen supply pipe 5 is arranged at one end of the outer composite pipe 6 close to the recovery and processing box 1, and the end of the outer composite pipe 6 away from the oxygen supply pipe 5 is connected to the oxygen supply pipe 7, and the oxygen supply pipe 7 is connected to the air pump 9.

[0048] In the composite sealing ring waste recycling device, the method for recycling the composite sealing ring realizes the separation of copper sheets, silicon dioxide, carbon dioxide and water, and can make full use of the residual oxygen and waste heat in the gas to reduce the energy consumption of the overall device and form by-products; the entire recovery device is processed in a sealed space to avoid heat and gas leakage, which is energy-saving and environmentally friendly; the circulation of gas circulation supply can further increase the separation effect of copper sheets, silicon dioxide, carbon dioxide and water, and avoid the phenomenon of silicon dioxide impurities mixing with copper sheets.

Claims

1. A composite sealing ring waste recycling device, comprising a recycling processing box (1), characterized in that: A rotating drum (16) is rotatably arranged in the recycling treatment box (1), the rotating drum (16) is arranged tilted, and the composite sealing ring is thermally decomposed in the rotating drum (16) to form copper flakes, silicon dioxide, carbon dioxide and water; The upper end of the rotating cylinder (16) is provided with a feed pipe (2) connected to the outside of the recovery and processing box (1); the lower end of the rotating cylinder (16) is provided with a separation port (25) for discharging copper flakes formed after thermal decomposition of the composite sealing ring; the lower end of the recovery and processing box (1) is provided with a transfer chamber for the copper flakes to fall; the lower end of the transfer chamber is connected to the separation and recovery box (13); A filter box (20) is arranged below the rotating cylinder (16), a filter screen (21) is arranged at the upper end of the filter box (20), a filter layer (22) is installed on the side of the filter box (20) away from the transfer chamber, an air pump (9) is arranged outside the recovery and processing box (1), an oxygen supply pipe (7), a discharge pipe (8) and a recovery pipe (12) are arranged on the air pump (9), the end of the recovery pipe (12) faces the separation port (25), the discharge pipe (8) is connected to the inside of the filter box (20), an outer composite pipe (6) is arranged outside the discharge pipe (8), an outer sandwich channel (24) is formed between the outer composite pipe (6) and the discharge pipe (8), one end of the outer sandwich channel (24) is connected to an oxygen supply pipe (5), the oxygen supply pipe (5) is connected to an external oxygen tank, and the other end of the outer sandwich channel (24) is connected to the oxygen supply pipe (7).

2. The composite sealing ring waste recycling device according to claim 1, characterized in that: A groove (27) is provided on the inner wall below the transfer chamber, a rubber pipe opening (28) is integrally provided at the bottom of the groove (27), a discharge port (26) above the separation recovery box (13) is butted against the rubber pipe opening (28), a discharge plate (19) is rotatably connected in the groove (27) via a rotating rod (29), and a torsion spring is provided at the connection between the rotating rod (29) and the discharge plate (19).

3. The composite sealing ring waste recycling device according to claim 1, characterized in that: The rotating cylinder (16) is provided with a plurality of sieve holes (17), and the sieve holes (17) are connected to the inside and outside of the rotating cylinder (16) at the same time.

4. The composite sealing ring waste recycling device according to claim 1, characterized in that: A motor (14) for driving the rotating drum (16) to rotate is installed at the lower end of the recycling treatment box (1).

5. The composite sealing ring waste recycling device according to claim 1, characterized in that: An absorption treatment box (10) is provided at the connection between the discharge pipe (8) and (9).

6. The composite sealing ring waste recycling device according to claim 1, characterized in that: The upper end of the feed pipe (2) is provided with a sealing cover (3) in an openable manner.

7. The composite sealing ring waste recycling device according to claim 1, characterized in that: The bottom of the recycling box (1) is provided with supporting legs (11).

8. The composite sealing ring waste recycling device according to claim 1, characterized in that: A pressure relief mechanism (4) is provided above the recovery and processing box (1).

9. The composite sealing ring waste recycling device according to claim 1, characterized in that: An electric heating plate (15) is installed on the inner wall of the recycling box (1).

10. A method for recycling composite sealing ring waste, characterized in that: The composite sealing ring waste recycling device according to any one of claims 1 to 9 further comprises the following steps: S1: thermal decomposition, sending the composite sealing ring into a sealed chamber for thermal decomposition, the thermal decomposition temperature is 400°C to 550°C, the composite sealing ring is mixed in the chamber during the thermal decomposition process, oxygen is provided to the sealed chamber during the thermal decomposition process, and copper sheets, silicon dioxide, carbon dioxide and water are formed after thermal decomposition; S2: separation, separating the copper sheet, silicon dioxide, carbon dioxide and water; Among them, the copper sheet is large in volume and is screened downward by gravity, the silicon dioxide particles are small and are separated by a filter structure arranged in the chamber, the water is evaporated, and the carbon dioxide is extracted by a mechanism that provides oxygen to the chamber; The extracted carbon dioxide contains a small amount of oxygen, which is separated and absorbed by chemical methods to form carbonate byproducts, and the remaining oxygen is circulated and supplied to the sealed chamber for use; S3: The pipeline for supplying oxygen to the sealed chamber is distributed along the pipeline for extracting carbon dioxide from the chamber, and the oxygen is heated by the residual heat in the carbon dioxide and then supplied to the sealed chamber for use; S4: Complete the separation of copper sheets, silicon dioxide, carbon dioxide and water in a sealed chamber to reduce heat and gas loss.

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